Tungsten bronzes Ax WO3 (0< x < 1) are a group of nonstoichiometric compounds .They have been found wide applications such as in optical ,electrical and chemical fields .The types and crystal structures of tungsten bronzes have been reviewed in this paper .According to the element A ,tungsten bronzes could be clas‐sified into five types .As the radius of A ion ,rA ,was in the range of 0 0.86‐0 1.43 nm ,the perovskite‐type tung‐sten bronzes could be formed .As the rA was large and out of the range ,the hexagonal ones can be formed .It was also found that the higher the valance of A ion was ,the narrower the range of x for single‐phase tungsten bronzes w as .%Ax WO3（0＜ x ＜1）型钨青铜是一类非整比化合物，具有丰富的物理特性，广泛应用于光学、电学和化学等领域。综述了文献已报道的钨青铜，按元素A的不同可将钨青铜分为5大类。通过对各种钨青铜的晶体结构分析，发现A 离子的半径 rA 满足一定条件（00．86 nm＜ rA ＜01．43 nm ）时可以形成钙钛矿类型的结构，当 rA 较大时可形成六方结构的钨青铜；而且A离子的价态越高，所形成钨青铜单相区 x 的范围就越窄。
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